Automobile oil filter



sept -1937. 'A COMPTON 2,093,549

y AUTOMOBLE OIL FILTER Fl'ed March 25, 1956 lINVENTOR (3L/ARL s A. COMPTON.

m, v ATTORNEY j Patented. sept. 21,v 1937 PATENT -oFFlcE '2,093,549 AU'roMoBmE on. FmrEn Charles A. Compton, Menlo Park, Calif. Application March 25, 1936, Serial No. '10,849

9 clama.v (c1. slof-134) My invention relates to improvements in automobile oil lters, and it consists of the combinations, constructions vand arrangements hereinafter described and claimed. An object of my invention. is to provide an automobile oil lter whichis4 an improvement over the form of the device shown in my Patent No..

2,065,658, issued December 29, 1936." S In the copending case I show an oil filter casing provided 10 with a removable cartridge, this cartridge carry-4 ing oil ltering means.

In the present invention I make thev bottom of the oil filtering casing bowl-shaped and I c place an outlet for sediment at the bottom or lowermost portion of .the bowl.

The inlet pipe for oil enters from a'point removed from the sediment outlet, and then the oil inlet pipe is curved so as to extend to the central portion of the casing.

In the present form ofthe invention I also provide a removable cartridge and this cartridge Vhas a dish-shaped perforated bottom that has a central opening large enough to' receive the inlet oil pipe. I further make use of a-pluralit'y of screening members all similar to one another, each member being provided with a dish-shaped perforated portion, and a. .circular flange bounding this portion. The lowermost screening mem-3 ber has its flange facing the' bottom-of a car- 3 0 tridge and this spaces the perforated portion of 1 the member above the cartridge bottom. An oil deilector issecured to the lowermost screening .member and faces in a direction to cause the oil to now toward the casing bottom immediately after the oil1 1eave's the inlet oil tube. The other screening members face in the opposite direction `andare separated from each other byilterpads. Themargins of the ilter pads areclamped'b'etween the ilanges of the screening members and 40 the wall of thel cartridgeb casing.V The cover is permanently secured to the cartridge casing and holds the screening members andpads in place. A cover forxthe oil lter casing is removably secured in place and locks the cartridge in posi-- tion. Gaskets-are placed'between the. top and bottom? of the cartridge and the cover o f the casing, and 'a' shoulder in the oil filter casing, respectively. An oil outlet pipe leadsfrom .the cover. Y 5 I further provide novel and simple means for clamping the oil lter to asupport, such as the I *dashboard of an' automobile. The .device is vsimple in construction and is durable and eiiicient for the purpose intended.. After the device has l ste-.d for @tel-mg i1 for agiven length 0f.

time, the cartridge may be removed and a new one substituted therefor. In this simple way a new oil filtering means can be substituted for the used one.

Other objects and advantages will appear in 5 the following specication, and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in theaccompanying drawing forming a part of this application, 10 in which Figure 1 is a vertical section through the devlce; l

Figure 2 is a sectional view through one of the oil pads; and

Figure 3 is a plan view of a portion of. one of the screening members.

In carrying out my invention I provide an. oil filter casing indicated generally at I. 'I'his casing has a bowl-shaped bottom 2, a shoulder 3, 20 a cylindrical portion 4, arounded shoulder 5, and a cylindrical portion 6 larger in diameter than the portion 4. At the Vbottom of thebowl-'shaped vformed therein and bosses |10 and Il formed lintegral with the bowl 2 project'beyond both sides of the bowl wall and the opening `9 extends 30 through these bosses. The boss I0 is internally threaded and carries an oil inlet tube I2, while theboss IIV is externally threaded and carries a coupling I3 that is used for connecting an oil tube I4 with the boss so that oil will ilow from 35 the tube I4 into the bore 9. Within `the casing I, I removably dispose a cartridge indicated -generally'at I5. This cartridge has a casing III provided vwith a dishshaped and perforated bottom Il.- 'I'he bottom 40 I1 also'has an opening I8 just large enough to receive the end I9 of the oil inlet tube I2. The

Abottom of the cartridge rests on a gasket 20 which in turn is supported by the shoulder 3. The cylindrical wall ofthe cartridge. casing I6 45 is shaped so as to snugly conform with the portions 4, 5 and' 6- of thevcasing I.. It will be noted from Figure 1 that the portion 2|. of the casing Iii-parallelsvthe portion 4 of the casing I. In like manner the portion 22 of, the casing 50 -I6 conforms to the 4portion 5 of the casing I for permanently securing the cover to the cartridge. l The wall 21 of the casing is enlarged slightlt'r to accommodate the enlarged portion 24 of the cartridge wall and the cover 25. l A gasket 28 is disposed between the cartridge cover 25 and a casing cover'29. The casing cover 29 is removably secured to the casing I by screws 30 that are passed through openings in the cover 29, and are threaded into threaded openings3| in a flange 32 integral with the casing, I. The height of the cartridgeis such that when the screws 30 are tightened in place, the cartridge will be clamped between the gaskets and 29, and this will prevent oil `from leaking around the outer side of the cartridge. l

Within the cartridge I dispose oil filtering means, and this means consists of screening members and filtering pads. In Figure 1, 'il

' show four screening members 33, 34, 35 and 36 inclusive. All of these are ofsimilar construction and eachfhas a dish-shaped portion 31 perforated at 38, and the dish-shaped portion is surrounded by a circular flange 39. In Figure 3, I show a plan view of a portion of the screening member 36, for example. It will be seen from. this figure that the dish-shaped portion 31 is provided with perforations 38 that are staggered in the manner `shown and are spaced a slight distance from a flange 39. 'I'he flange 39 bounds the portion 31.

The lowermost screening member 33 is disposed .ip the cartridge so that its flange 39 faces the bottom I1 of the cartridge casing. 'I'his flange 39 contacts with the portion 2| of the cartridge and spaces the portion 31 of the' screeningl member 33 above the perforated bottom I1. A defiector 40 for oil is permanently secured to the member 33 by means of a rivet 4I, or other suitable fastening means. -'I'his oil deilector faces downwardly and its rim 42 contacts with the cartridge bottom I1. construction that as oil issues from the tube I2 it will be deflected downwardly by the member 40 as indicated by the arrows 43.

'I'he flanges 39 on the other three screening members 34, 35 and 36 face towardthe top of the cartridge. 35 and 36 are identical to the member 33 it will be seen that the flanges 39 of the last three screening members are spaced from the wall of the cartridge.,

I disposeflltering pads indicated generally at 44, se'e Figure 2, between adjacent screening members.l The two lowermost pads each comprise two layers of cotton batting 45 and 46 or other suitable filtering material, and these two layers 41 and 43. Stitching 43 maybe used for securing.

lare placed one above the other, and their outer surfaces are covered by circular pieces of cloth the two layers of cloth and layers of cotton batting together. 'Ihe diameter of the iiltering member 44 is larger than the diameter oi' the portion 31 of the screening members. 'Ihis will cause the marginal -`edge of the pad to extend beyond the flange 39. The thickness ot the pad 44, when not compressed, is considerably greater than the space between the flanges 39 of the members 33 and 34. This construction causes the pad 44 to completely fill the middle portion of the space between the members 33 and 34 even though this portion is considerably greater than the space between the marginal edges oi' the same members. 'I'he portion of the pad projecting beyond the marginal edges is clamped between tridge.

It will be seen from this Since the screening members 34,

ting so that its thickness will `be substantially' one-third greater than the other two pads 44. The top pad in all other respects is identical to the pad 44. 'I'he pad 50 is compressed between the members 35 and 36 and the edge of the Vpad is clamped between the ange 39 of the member 36 and the wall portion 24 of the car- After all of thev screening members and filter-pads have been disposed in place in the manner just indicated, the cartridge cover 25 is secured in place by crimping as shown at 26. The cartridge as a unit may now be disposed in the oil lter casing I and may be locked in place by the casing cover 29 in the manner already set forth. I

'I'he casing I may. be secured to a'. supporting member such as a dashboard 5I of an automobile, and I provide a circular U clamp band 52 for surrounding the casing. A bolt 53 moves the legs 54 and 55 of the clamp toward each other for turned ends 56 of the legs are secured to the support 5I by bolts 51, or other suitable fastening means. A washer strip 58 may be disclosed between the bolt heads 59 and the support 5I.

From the foregoing description of the various parts of the device the operation thereof may be readily understood.

The cover 29 carries an oil outlet elbow 63, and this elbow is ,connected to an oil return pipe 6I by means of a coupling 92. This return pipe 6I leads to the crank case of an .automobile engine not shown. The inlet oil tube I4 also leads from the crank case and an oil pump not shown is used for forcing the oil through the filter.

The oil passes through the pipe I2,.and then is deflected by the deflector 40 down toward the bowl-shaped bottom 2 of the casing. v'I'he oil is initially screened in passing through the perforated bottom I1. 'I'he oil then is caused tol flow upwardly as shown lby the arrows and again cartridge. 'Ihe sudden reversing of the oil ow causes it to give up foreign particles held in suspension. A third filtering of the oil takes place when it passes upwardly through the perforated bottom I1. From this point the oil passes successively through thev screening members 33 to 33 inclusive and the filtering pads disposed between these members. 'I'he top member 36.spaces the top pad 50 from the cartridge cover 25 and therefore a reservoir 63 forl clean oil is provided; 'I'he cartridge cover 25 has a large opening 64 andthe oil therefore will find its way through the opening and out through the elbow 60, and then to the return` oil pipe 6I that conveys the oil back to the crank case. 'I'he construction of the pads and screening members 34 to 36 inclusive is such as to prevent the oil from passing around the outside of the flanges 39. The unperforated rim portions of the screens 34, 35 and 36 tend to direct the oil inwardly. Sufficient ltering material is afforded in the pads to clean the oil before it reaches the top reservoir 63. The filtering of theoil is continuous so long as the engine operates and the oil is delivered to the device.

As soon as the engine stops the oil in the reservoir 63 will lgravitate down to the point where the oil level is iiush with the inlet end of the pipe l2. This backward ilow of oil has a tendency to clean the pads of foreign matter and to deposit this foreign matter in the bowl-shaped portion 2. It should also be noted that the purpose of initially directing the oil flow downwardly from the de fiector 40 and then reversing this ow to cause the oil to flow upwardly is to separate foreign particles from the oil. These particles will continue to move downwardly to the bottom of the bowl 2 A cartridge may be substituted forthe used one,

and then the ycover 29 secured in place. The device is now like new and can effectively clean the oil for another given time period,

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made with-l in the scope of the appended claims without de parting from the spirit of the invention. I'claim: 1. In an automobile oil filter, a casing with a shoulder therein and a top, a screening member f supported by the shoulder, a second screening member, disposed above the first member land carrying an integral flange, designed to rest on the first member for spacing the second member above the vfirst member, an oil inlet conduit ex` tending through the casing wall and having its inner end projecting a slight distance through the rst mentioned screening member for directn ing the oil upwardly, a defiector disposed adjacent to the inner end of the conduit for 'directing the oil downwardly, said deflector being positioned between the two screening members, ltering material disposed between the second screening member and the casing top, and an oil outlet' leading from the top.

diameter and a. perforatedbottom, said casing- 2. In an oil lter cartridge comprising-a cylin.-

drical casingl with a` loyver portion of a reduced diameter and va perforated bottom, said casing having a shoulder connecting the reduced por-v "tion with the remainder of the casing, a screening membendisposed inthe casing bottom and provided' with an integral flange of the same length as the length of the reduced portion,

whereby the screening member forms a continuation of the shoulder, and va second screening member similar to the first and placed in the casing with its ange extending in av direction opposite to the flange of the rst member, and a. iilterV ing pad disposed betweenA the screening members and having its marginal edge extending over the shoulder and clamped between the flange of the second member and the casing wall.

3. In an oil iilter cartridge comprising a cylindrical casing with a lower portion of a reduced having a shoulderA connecting the reduced portion with the remainder of the casing, a screening member disposed in the casing bottom and provided with an integral flange o fthe samel length as the lengthl of thereduced portion, whereby the screening member forms a continuation of the shoulder, and a second screening placed between adjacent members and having their edges clamped between the angesV of thel ,members and the casing wall.

4. In an oil lter cartridge comprising a cylindrical casing with a lower portion of a reduced diameter and a perforated bottom, said casing having a shoulder-connecting the reduced portion withthe remainder of the casing, a screening member disposed in the casing bottom and provided with an integral iiange of the same length as the length of the reduced portion, whereby the screening member forms a continuation of the shoulder, and a second screening member similar to the rst and placed in the casing with its ange extending in a direction opposite to the flange of the first member, and a filtering pad f disposed between the screening members and\ having its marginal edge extending over the shoulder 'and clamped between the dange ofthe second memberl and the casingwall, additional similar screening membersplaced on top Iof the second named member, and ltering pads placed between adjacent members and having their edges clamped between the ilanges of the members and the casing wall, a cover for the cartridge casing, the ange of the -top screening member bearing against the cover for forming an oil reservoir..

V5. A cartridge for an oil iilter having a dishshaped and perforated bottom, with-'a central' opening larger tha the perforations, and an oil 40 deector disposed within the cartridgeand being spaced from the large central opening, the rim of the deeectr contacting with the bottom.

spaced from the large centraLopening, oil ltering means disposed in the cartridge and including screening members and ltering pads, one of 50 said members carrying theV oil detlector, the rim of the deiector contacting with the bottom.

7. A cartridge for -an oil iilter having a dish!- shaped and lperforated bottom, with a. central opening larger than the perforations, and an 1 oil defiector disposed within the cartridge and being spaced from the large central opening, the rim of the deector contacting with the bottom, oil iiltering means disposed in the cartridge and including 'screening members and ltering pads, 60

one of said members carrying the oil deilector, and a cover for the cartridge and bearing against the uppermost screening member and pad, said cover being permanently secured to the cartridge.

e 8. A removable cartridge for an oil lter and comprising a casing, a plurality of similar screening members'each including a dish-shaped perforated portion bounded by a circular flange, the flange of the lowermost screening member facing/toward' the casing bottom while, all of ,the other members are invertedL andlteringpads disposed between. adjacent membersJhe bottom of the casing being perforated, the dish-shaped portion of the lowermo's't member being spaced 75 A screens, tbeedges oi the pads being clamped to y the casing wall by the flanges, said screening bottoms being perforated, the perforations starting a short distance from the nanges,'whereby the unperforated bottom portions constitute oil directing means for guiding the oil toward the interior ot the lter.

` Y- CHARLES A. COMPTON. 

